package com.thinker.concurrency;

public class ConcurrencyTest {
	private static final long count = 1000000000l;

	public static void main(String[] args) {
		concurrency();
		serial();
	}

	private static void concurrency() {
		long start = System.currentTimeMillis();
		Thread thread = new Thread(new Runnable() {

			@Override
			public void run() {
				int a=0;
				for(long i=0;i<count;i++) {
					a+=5;
				}
			}
		});
		thread.start();
		int b=0;
		for(long i=0;i<count;i++) {
			b--;
		}
		long time=System.currentTimeMillis()-start;
		System.out.println("concurrency:"+time+"ms,b="+b);
	}
	private static void serial() {
		long start=System.currentTimeMillis();
		int a=0;
		for(long i=0;i<count;i++) {
			a+=5;
		}
		int b=0;
		for(long i=0;i<count;i++) {
			b--;
		}
		long time=System.currentTimeMillis()-start;
		System.out.println("serial:"+time+"ms,b="+b+",a="+a);
	}
}
